Vehicle Battery Plug Layout That Prevents Reverse Connection
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Solution Overview
Problem
Existing plug technologies for connecting terminal devices to vehicle batteries require users to identify polarities, making the connection process inconvenient and prone to reverse connections that can cause accidents like short circuits.
Innovation Solution
A plug design with an insulating housing, a first terminal, and at least one pair of second terminals arranged in central symmetry, allowing for secure connection to a vehicle battery regardless of the plug's orientation upon insertion into a terminal device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If users manually identify polarities before connecting the plug, then connection safety is improved, but ease of operation deteriorates
Solution Approach 1:
The patent employs asymmetric terminal arrangement where the first terminal and second terminal are positioned at different locations on the plug body. This asymmetric design ensures that only one orientation of the plug will correctly align with the corresponding terminals in the terminal device, preventing reverse connection while maintaining simple user operation. The asymmetric positioning of terminals with different polarities eliminates the need for users to manually identify polarities.
2Device complexity
If the plug uses a simple two-terminal design, then device complexity is reduced, but reliability deteriorates due to potential reverse connection
Solution Approach 1:
The patent maintains a simple two-terminal design while incorporating asymmetric positioning of the first and second terminals on the plug body. This asymmetric arrangement ensures that reverse connection is physically prevented, as the terminals will not align correctly with the terminal device when inserted in the wrong orientation. The solution achieves reliability enhancement without increasing device complexity.
Data Source
AI summary
A plug, an electrical connector and a terminal device are provided. The plug is used for connecting to the terminal device related to a vehicle battery. One end of the plug can adapt to an output port of the terminal device, and the other end of the plug can be connected to the vehicle battery through wires, so that the terminal device can detect or perform charging and discharging operations on the vehicle battery. The plug includes an insulating housing, a first terminal arranged in the insulating housing, and at least a pair of second terminals arranged in the insulating housing. Each pair of second terminals being distributed in central symmetry with the first terminal as the center, and the polarity of the first terminal is the opposite of the polarity of the second terminals.